Developmental Response of Three Geographic Isolates of Lysiphlebus testaceipes (Hymenoptera: Aphididae) to Temperature

• Published in: Environmental entomology Vol. 30; no. 4; pp. 637 - 641
• Main Authors: Royer, T. A, Giles, K. L, Kindler, S. D, Elliott, N. C
• Format: Journal Article
• Language: English
• Published: Lanham, MD Entomological Society of America 01-08-2001
• Subjects: Animal and plant ecology; Animal, plant and microbial ecology; Animals; Aphidiidae; Biological and medical sciences; biological control; Demecology; development; Fundamental and applied biological sciences. Psychology; Lysiphlebus testaceipes; parasitoid; PHYSIOLOGICAL AND CHEMICAL ECOLOGY; Protozoa. Invertebrata; Schizaphis graminum; United States; North America; America; USA; Aphidoidea; Temperature; Insecta; Biological control; Aphidiidae; Environmental factor; Survival; Sex ratio; Pest; Parasitoid; Homoptera; Beneficial animal; Arthropoda; Aphididae; Development; Population dynamics; Hymenoptera; Invertebrata; Schizaphis graminum; Geographical variation; Adaptation
• ISSN: 0046-225X; 1938-2936
• DOI: 10.1603/0046-225X-30.4.637

Using greenbugs, Schizaphis graminum (Rondani), as a host, the number of days required for development, survival, and sex ratio (female:male) were studied at five constant temperatures (10, 14, 18, 22, and 26°C) for colonies of Lysiphlebus testaceipes (Cresson) collected in south Texas, central Oklahoma, and central Nebraska. Developmental rate and lower development threshold were described by a linear function and compared among wasp colonies. The temperature thresholds for development from egg to adult for the Nebraska, Oklahoma, and Texas wasp colonies were estimated to be 5.64, 6.61, and 6.42°C, respectively; corresponding degree-day requirements for development were 181.2, 169.5, and 188.0 DD, respectively. No differences in developmental rate or lower development threshold estimates were observed among the wasp colonies. However, adult survival at 10°C was greater in the Nebraska colony, suggesting that there may be variation in the ability of L. testaceipes populations to tolerate and survive cold temperatures.